Dial an extension then trigger another with wav

Can anyone suggest - is there a way to create an extension, so that, when dialled, it calls another extension and plays a sound file? For example, in case of emergency a user dials 5000, which subsequently triggers a paging extension to be dialled with a pre-recorded message to be played over the paging channel?

Type:

core show application originate
and
core show application page

at the CLI prompt.